The behaviourt of small- and large-scale variations of in-cylinder flow during intake and compression strokes in a motored four-valve spark ignition engine
Restricted accessResearch articleFirst published online August, 2004
The behaviourt of small- and large-scale variations of in-cylinder flow during intake and compression strokes in a motored four-valve spark ignition engine
An experimental study was conducted to investigate the small-scale and large-scale variations of flow within the cylinder of an internal combustion engine (turbulence and cyclic variation) during the intake and compression processes. Spatial fast Fourier transform (FFT) filtering techniques with various cut-off lengths were used to determine whether there existed a particular length scale that differentiated turbulence from cyclic variations. The flow field was measured using a particle image velocimetry (PIV) system, which was set with 1.25 mm grid spacing. From the experiments and analysis, it was found that there was no particular size of vortical structures dominating the flow field during intake and compression strokes over many cycles. It was also found that not only the ensemble-averaged variation but also the standard deviation of the large- and small-scale variations were greater during the early intake and late compression compared with late intake through the early compression process.
FraserR. A.FeltonP. G.BraccoF. V.SantaviccaD. A.Preliminary length scale measurements in a motored I.C. engine. SAE Paper 860021, 1986.
2.
FanslerT. D.FrenchD. T.Cycle-resolved laser-velocimetry measurements in a reentrant bowl-in-piston engine. SAE Paper 880377, 1988.
3.
FraserR. A.BraccoF. V.Cycle-resolved LDV integral length scale measurements in an I.C. engine. SAE Paper 880381, 1988.
4.
ArcoumanisC.HuZ.VafidisC.WhitelawJ. H.Tumbling motion: A mechanism for turbulence enhancement in spark-ignition engines. SAE Paper 900050, 1990.
5.
CataniaA. E.MitticaA.Extraction techniques and analysis of turbulence quantities from in-cylinder velocity dataTrans. ASME, J. Engng for Gas Turbines and Power, July 1989, 111, 466–478.
JosefssonG.FischerJ.MagnussonI.Length scale measurements in an engine using PIV and comparison with LDV In Proceedings of the Fifth International Symposium on Diagnostics and Modeling of Combustion in Internal Combustion Engines (COMODIA 2001), Nagoya, Japan, 1–4 July 2001.
8.
LiouT. M.SantaiccaD. A.Cycle resolved LDV measurements in a motored IC engineTrans. ASME, J. Fluids Engng, 1985, 107, 232–240.
9.
AmelioM.BovaS.De BartoloC.The separation between turbulence and mean flow in ICE LDV data: The complementary point-of-view of different investigation toolsTrans. ASME, J. Engng for Gas Turbines and Power, 2000, 122, 579–587.
10.
ChoiW. C.GuezennecY.Study of the flow field development during the intake stroke in an I.C. engine using 2-D and 3-D PTV. SAE Paper 1999-01-0957, 1999.
11.
ReussD. L.KuoT.KhalighiB.HaworthD.RosalikM.Particle image velocimetry measurements in a high-swirl engine used for evaluation of computational fluid dynamics calculations. SAE Paper 952381, 1995.
12.
ReussD. L.Two-dimensional particle image velocimetry with electro-optical image shifting in an internal combustion engine. In Proceedings of SPIE Conference on Optical Diagnostics in Fluid and Thermal Flows, (Eds S. S. Cha and J. D. Trolinger), Vol. 2005, 1993, pp. 413–424.
13.
ReussD. L.BardsleyM.FeltonP. G.LandrethC. C.AdrianR. J.Velocity, vorticity, and strain-rate ahead of a flame measured in an engine using particle image velocimetry. SAE Paper 900053, 1990.
14.
ReussD. L.AdrianR. J.LandrethC. C.FrenchD. T.FanslerT. D.Instantaneous planar measurements of velocity and large-scale vorticity and strain rate in an engine using particle-image velocimetry. SAE Paper 890616, 1989.
15.
Le CozJ. F.Cycle-to-cycle correlation between flow field and combustion initiation in an S.I. engine. SAE Paper 920517, 1992.
16.
ReussD. L.Cyclic variability of large-scale turbulent structures in directed and undirected I.C. engine flows. SAE Paper 2001-01-0248, 2001.
17.
LiY.ZhaoH.PengZ.LadommatosN.Particle image velocimetry measurement of in-cylinder flow in internal combustion engines—experiment and flow structure analysisProc. lnstn Mech. Engrs, Part D: J. Automobile Engineering, 2002, 216 (D1), 65–81.
18.
RaffelM.WillertC.KompenhansJ.Particle Image Velocimetry: A Practical Guide, 1998 (Springer-Verlag, Berlin, Germany).
19.
WesterweelJ.Digital particle image velocimetry: Theory and application. PhD Thesis, Delft University, Delft University Press, 1993.
20.
RoulandE.TrinitéM.DionnetF.FlochA.AhmedA.Particle image velocimetry measurements in a high tumble engine for in-cylinder flow structure analysis. SAE Paper 972831, 1997.
21.
LiY.ZhaoH.PengZ.LadommatosN.Tumbling flow analysis in a four-valve spark ignition engine using particle image velocimetryInt. J. Engine Res., 2002, 3 (3), 139–155.
22.
LiY.LiuS.ShiX.-S.SuiX.An investigation of tumbling flow in a four-valve spark ignition engineProc. lnstn Mech. Engrs, Part D: J. Automobile Engineering, 2001, 215 (D2), 273–284.
23.
JaffriK.HascherH.NovakM.LeeK.SchockH.BonneM.KellerP.Tumble and swirl quantification within a motored four-valve SI engine cylinder based on 3-D LDV measurements. SAE Paper 970792, 1997.
24.
DaneshyarH.FuellerD. E.Definition and measurement of turbulence parameters in reciprocating I.C. Engines. SAE Paper 861529, 1986.
25.
DaneshyarH.ParsiM.A study of cyclic variations in gas velocities in an engine cylinder. SAE Paper 892100, 1989.
26.
HorrocksG. D.ReizesJ. A.HongG.Tumble vortex breakdown during the compression stroke of a model internal combustion engine. In ICE Fall Technical Conference (Ed. BellS. R.), Peoria, Illinois, 23–26 September 2000, ICE Vol. 35–1, Paper 200-ICE-303.
